✅ Add setup and teardown database for tests (fastapi#626)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

Author: estebanx64

src/backend/app/tests/conftest.py

@@ -2,19 +2,27 @@
 
 import pytest
 from fastapi.testclient import TestClient
-from sqlmodel import Session
+from sqlmodel import Session, delete
 
 from app.core.config import settings
 from app.db.engine import engine
+from app.db.init_db import init_db
 from app.main import app
+from app.models import Item, User
 from app.tests.utils.user import authentication_token_from_email
 from app.tests.utils.utils import get_superuser_token_headers
 
 
-@pytest.fixture(scope="session")
+@pytest.fixture(scope="session", autouse=True)
 def db() -> Generator:
     with Session(engine) as session:
+        init_db(session)
         yield session
+        statement = delete(Item)
+        session.execute(statement)
+        statement = delete(User)
+        session.execute(statement)
+        session.commit()
 
 
 @pytest.fixture(scope="module")